How many movies have Koichi Sakamoto and Riku Sanjou collaborated on?

They have worked on 5 movies together! Their first movie together was Kamen Rider W Forever: A to Z/The Gaia Memories of Fate (2010) while their highest rated movie together was Kamen Rider Fourze: Climax Episode (2012). They have not worked together since Zyuden Sentai Kyoryuger vs. Go-Busters: The Great Dinosaur War (2014). They are most known for their adventure films together.